c++filt - c++ name demangler
c++filt filename...
c++filt copies each file name in sequence, and writes it on the standard output after decoding symbols that look like C++ mangled names. c++filt handles Sun C++ versions 3.0 through 5.0 mangled names. c++filt reads from the standard input if no input file is specified.
nm(1), dem(1)